I have had my tank over a year and half now and latley my live rock has lost its coraline agle and is taken over by brown alge. Its only on the rocks, the back of the tank is covered with coraline alge, how can i get rid of the brown alge????
check your phos. and nitrates if they are high they can cause the brown algea. Have you cleaned any of the brown algea off. I bet your corraline is under it.
HTH
Chelle